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279 Thule (A888 UA)
Classification: Outer Main-belt Asteroid          SPK-ID: 2000279
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 58 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04351239449160568 1.9456e-08  
a 4.266985563822102 2.056e-08 au
q 4.081318804679088 9.0221e-08 au
i 2.334485902842245 6.5391e-07 deg
node 71.88639276119805 2.4376e-05 deg
peri 26.05758179066525 3.5025e-05 deg
M 277.8226306674202 1.89e-05 deg
tp 2460131.402831894522
(2023-Jul-05.90283189)
0.00017129 TDB
period 3219.43889942872
8.81
2.3269e-05
6.371e-08
d
yr
n .1118207275385413 8.082e-10 deg/d
Q 4.452652322965116 2.1455e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3539  
   data-arc span      47670 days (130.51 yr)  
   first obs. used      1890-12-12  
   last obs. used      2021-06-18  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .42954  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-09 13:14:39  

Additional Information
 Earth MOID = 3.09853 au 
 Jupiter MOID = .647922 au 
 T_jup = 3.027 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456137.5 (2012-Jul-29.0) TDB
Reference: JPL 58 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .008634486340001361 1.8906e-08  
q 4.239692183555864 7.8302e-08 au
tp 2457339.952200171786
(2015-Nov-13.45220017)
0.0010491 TDB
node 73.6201503791311 2.5196e-05 deg
peri 77.38554299647248 0.00012258 deg
i 2.337870062398647 6.4812e-07 deg
  Orbit Determination Parameters
   # obs. used (total)      3539  
   data-arc span      47670 days (130.51 yr)  
   first obs. used      1890-12-12  
   last obs. used      2021-06-18  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .42954  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-09 13:14:39  

Additional Information
 Jupiter MOID = .647922 au 
 T_jup = 3.027 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.574370954751229E-16 -1.428089229446256E-15 -6.583956837466405E-12 -7.600803746220122E-14 -6.553714323785496E-13 -1.537039470719417E-15
q -1.428089229446256E-15 6.131195802340661E-15 2.311978493107563E-11 2.863635545174392E-13 2.270267047196322E-12 5.689287439661491E-15
tp -6.583956837466405E-12 2.311978493107563E-11 1.100611172080812E-6 -1.936558600779632E-9 1.25966649862916E-7 -4.816096825641643E-11
node -7.600803746220122E-14 2.863635545174392E-13 -1.936558600779632E-9 6.348392618976827E-10 -8.416498047323426E-10 1.577356291466475E-11
peri -6.553714323785496E-13 2.270267047196322E-12 1.25966649862916E-7 -8.416498047323426E-10 1.502702520034644E-8 -2.092917118554129E-11
i -1.537039470719417E-15 5.689287439661491E-15 -4.816096825641643E-11 1.577356291466475E-11 -2.092917118554129E-11 4.200587118236664E-13

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 8.53   n/a E2021B10 IRAS observations used: 9
diameter diameter 126.59 km 3.7 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 9
rotation period rot_per 23.896 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Marciniak, A.; Pilcher, F.; Oszkiewicz, D.; Bartczak, P.; et al. (2016) Proc. Polish Ast. Soc. 123, 51-57.]
geometric albedo albedo 0.0412   0.003 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 9
B-V BV 0.746   0.049 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=6; phase (min.=7.15, mean=11.21, max.=13.24) deg.
U-B UB 0.232   0.044 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=5; phase (min.=9.92, mean=12.02, max.=13.24) deg.
Tholen spectral type spec_T D   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo
SMASSII spectral type spec_B X   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

279 Thule (A888 UA)          Discovered 1888-Oct-25 by Palisa, J. at Vienna
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1912-Aug-12 01:14 00:02 Jupiter 1.21341363877352 1.21341334785347 1.2134139296935 2.31927363845789 1.99572835314241 2419626.551342020 1.89093553053746 17.2823634532304 7.60047353401422 -85.9446626630559 5631578.13016643 T 58 CATAB v2.0g-lin.ifort 2021-Jul-09 13:16:20 2021-Jul-09 13:16
1946-Nov-19 13:20 00:02 Jupiter 1.20609017222336 1.20608989957174 1.20609044487505 2.17549144857262 1.82433200957786 2432144.055884249 1.82560181821533 29.1382815869826 2.47473970161483 84.9145447136179 6079280.4660009 T 58 CATAB v2.0g-lin.ifort 2021-Jul-09 13:16:20 2021-Jul-09 13:16
1981-Jun-25 20:47 00:01 Jupiter 1.15870471301405 1.15870449172674 1.15870493430129 2.01227162247227 1.6084840429496 2444781.365994908 1.3062412314015 34.0487994793293 3.81372079358706 -84.9289034146163 6063078.68625001 T 58 CATAB v2.0g-lin.ifort 2021-Jul-09 13:16:20 2021-Jul-09 13:16
2016-Jul-07 14:59 < 00:01 Jupiter 1.15204711090297 1.15204688764914 1.15204733415678 1.99959397476487 1.58994056664889 2457577.124460450 0.218248899503755 19.4182437769184 2.78057653679406 -74.7100294752896 13299766.871473 T 58 CATAB v2.0g-lin.ifort 2021-Jul-09 13:16:20 2021-Jul-09 13:16
2051-May-23 05:23 00:01 Jupiter 1.17810465203229 1.17810444393277 1.1781048601318 2.09492870442008 1.71778498129459 2470314.724474553 1.28046336237319 34.393661102046 2.11436443160003 -85.760754340425 6540932.85407879 T 58 CATAB v2.0g-lin.ifort 2021-Jul-09 13:16:20 2021-Jul-09 13:16
2085-Oct-21 13:30 00:02 Jupiter 1.22247689112927 1.22247659491779 1.22247718734076 2.34750122086486 2.03101302005176 2482885.062805319 1.64253018829587 27.4595251060636 4.70703803704463 -76.5253027308369 5215453.83323799 T 58 CATAB v2.0g-lin.ifort 2021-Jul-09 13:16:20 2021-Jul-09 13:16
2120-Feb-18 16:49 00:02 Jupiter 1.18767965185649 1.18767935137884 1.18767995233407 2.44554545191484 2.13409093394307 2495422.200996319 1.62627232024695 18.3799959672267 5.91037154219601 -64.1197772631581 6462239.85067019 T 58 CATAB v2.0g-lin.ifort 2021-Jul-09 13:16:20 2021-Jul-09 13:16
2154-Nov-28 11:19 00:02 Jupiter 1.14408370992528 1.14408344960909 1.1440839702414 2.42592386555989 2.0986677590551 2508123.971654742 1.52132194829877 14.5861091748987 7.47808015700039 -87.7465781296967 6567320.66848078 T 58 CATAB v2.0g-lin.ifort 2021-Jul-09 13:16:20 2021-Jul-09 13:16
2190-Jan-31 11:27 00:02 Jupiter 1.13638488001749 1.1363846399377 1.13638512009729 2.44685412753909 2.12046300845477 2520971.976846561 2.11086394631073 24.9129889656952 5.4197911237145 82.2875432693659 6585147.22087082 T 58 CATAB v2.0g-lin.ifort 2021-Jul-09 13:16:20 2021-Jul-09 13:16

Alternate Designations
 A888 UA = 1927 EC = 1954 FF = A920 GA = A923 RA 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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